Regulating system



A April 1930. v. M. MONTSINGER 1,756,875

REGULATING SYSTEM Filed March 25, 1926 Inventor:

Vincent M. Mon'tsinger,

His Attorney Patented Apr. 29, 1930 UNITED STATES PATENT, OFFICE VINCENTI. MONTSINGER,

ELECTRIC REGULATING SYSTEM Application filed March 25, 1926. Serial No.97,445.

My invention relates to regulating systems and particularly to a systemfor obtaining a constant alternating current voltage from a variablevoltage source of alternating current and its object is to provide animproved arrangement for accomplishing this result.

In accordance with my invention, I provide a transformer which has itsprimary winding connected in series with an impedance across thevariable voltage source and its secondary winding connected to thecircuit across which it is desired to maintain the voltage constant andmeans for varying the reluctance of the magnetic circuit of thetransformer in response to the suppl voltage so that the voltage inducedin t e secondary winding remains substantially constant.

My invention will be better understood from the following description,taken in connection with the accompanying drawing, and

its scope will be pointed out in the appended claims.

In the accompanying drawing, which shows one embodiment of my invention,1 represents a source of alternating current, the voltage of whichvaries, and 2 represents a distribution circuit, such as a lightingcircuit, across which it is necessary to maintain the voltagesubstantially constant. In'order to maintain a substantially constantvoltage across the circuit 2, I provide a transformer 3 which comprisesa stationary core member 4 and a movable core member 5 which is arrangedto be actuated by an electromagnet 6. The electromagnet 6 is connectedacross the variable voltage source 1, so that the air gap between thetwo core members is in- 4 creased when the source voltage increases andis decreased when the source voltage decreases. The electromagnet 6 actsagainst a biasing spring 7 which tends to pull the two core memberstogether. The electromagnet 6 and spring 7 therefore coact to increaseand decrease the reluctance of the magnetic circuit of the transformeras the supply voltage varies.

The primary winding 8 of the transformer is connected in series with animpedance 9,

shown as a reactance, across the source 1 and the secondary winding 10of the transformer is connected across the load circuit 2. TheseWindingsmay be wound on the same or different core members as desired.

The operation of the arrangement shown in the drawing is as follows:When the voltage of the source 1 is normal the electromagnet 6 is sodesigned that it maintains the core members separated a predeterminedamount so that the current in the primary circuit has a certain valuefor a given load connected across the secondary circuit 2. This primarycurrent produces a voltage drop across the reactance 9 so that theproper voltage is impressed upon the primary winding 8 to cause theproper voltage to be induced in the secondary winding 10.

When the voltage of the source 1 increases, the electromagnet 6increases the air gap be tween the two core members 4 and 5 so that thereluctance of the magnetic circuit of the transformer is increased.Consequently, the

primary exciting current increases and the voltage drop across theimpedance 9 is increased. The magnet 6 and spring 7 are so arranged thatfor any increase in the supply voltage the air gap is increased thenecessary amount to increase the voltage drop across the impedance 9substantially the same amount as the supply voltage increases.Therefore, the voltage impressed upon the rimary winding 8 and thevoltage induced in the secondary winding remain substan tially constant.

The arrangement operates in a similar manner to decrease the air gapwhen the supply voltage decreases, so that the primary exciting currentis decreased the necessary amount to produce a decrease in the voltagedrop across the impedance 9 which is substantially equal to the decreasein the supply voltage.

\Vhile I have, in accordance with the pat ent statutes, shown anddescribed one particular embodiment of my invention, changes andmodifications will be obvious to those skilled in the art and I,therefore, aim in the appended claims to cover all such changes andmodifications as fall within the true spirit and scope of my invention.

- What I claim as new and desire to secure by Letters Patent of theUnited States, is

1. In a regulating system, avariable voltage source of alternatingcurrent, a load cir-. cuit, a transformer having a primary windingconnected across said source and a secondary winding connected acrosssaid load circuit, an impedance connected in series with said primarywinding, and means responsive to the voltage of said source for'varymgthe reluctance of the magnetic circuit of said transformer.

2. In a re ulating system, a variable voltage source 0 alternatingcurrent, a load circuit, an impedance, a transformer comprising aprimary winding connected in series with said impedance across saidsource, a secondary winding connected across said load circuit, astationary core member and a movable core member, biasing means arrangedto maintain said core members together whereby the reluctance of themagnetic circuit of said transformer is relatively low, and

electrores onsive means responsive to the voltage 0 said source arrangedto move said core members apart to increase the reluctance of themagnetic circuit of said transformer. In witness whereof, I havehereunto set my hand this 22nd day of March, 1926.

VINCENT M. MONTSINGER'.

